Ball joint is a mechanical component used in various industries for connecting two parts of a machine. It is also known as universal joint, pivot joint, knuckle joint, and spherical joint. The ball joint allows rotational movement in multiple directions, enabling flexible movement of the connected components. Other similar terms used for ball joint include swivel joint, clevis joint, socket joint, and hinge joint. These joints are commonly found in automobiles, airplanes, and even in human anatomy, such as the shoulder and hip joints. Various synonyms for ball joint are used based on their application and usage in different industries.